Welding and Cutting

Consumable Electrode Welding

Gas Metal Arc Welding

Gas Metal Arc Welding (MIG or MAG)

• Consumable Wire Electrode
• Shielding Gas
• Constant Voltage, DC (usually)
• Methods
  • Globular
  • Short-Circuiting
  • Spray
  • Pulsed-Spray
• MIG = Metal Inert Gas welding
• MAG = Metal Active Gas welding

SMAW Stick Welding

Stick Welding / Shielded Metal Arc Welding / MMAW / Flux Shielded Arc Welding

• Consumable Electrode

• Flux Coating over electrode
  • Flux vaporizes to Shielding Gas
  • Flux also lays slag
• Primarily Iron and Steel
  Flux-Cored Arc Welding (FCAW or FCA)
• Consumable Tubular Electrode
  • Flexible wire-like

• Flux Core
  • Flux provides protection from atmosphere.
  • Shielding gas may be used but not usually.

Non-Consumable Electrode Welding

TIG Welding

TIG / Gas Tungsten Arc Welding (GTAW)

• NON-consumable Tungsten Electrode
• Inert Shielding Gas (Ar or He)
• Constant Current
• Thin Sections of Stainless Steel and Non-Ferrous